Antenna booster



Nov. 3, 1959 J. v. GERGELY 2,911,643

ANTENNA BOOSTER Filed July 5, 1957 2 Sheets-Sheet 1 Fig.

John 1 Gerge/y IN VEN TOR.

1959 J. v. GERGELY 2,911,643

ANTENNA BOOSTER Filed July 5, 1957 2 Sheets-Sheet 2 John 1 Gerge/yINVENTOR.

United States Patent Otficc 2,911,643 Patented Nov. 3, 1959 2,911,643ANTENNA BOOSTER John V. Gergely, Detroit, Mich., assignor to WrenProducts Corporation, Detroit, Mich., .a corporation of MichiganApplication July 5, 1957, Serial No. 670,127 2 Claims. (Cl. 343-711)This invention relates to an antenna booster especially adapted for usein conjunction with radios as are conventionally mounted on automobilesor other similar vehicles, and more particularly to a device adapted foruse in conjunction with the conventional antenna customarily mounted onautomobiles.

The primary object of the present invention resides in the means forboosting the quality and quantity of signal reception provided byconventional whip antennas.

As is known whip antennas do not provide any considerable service forreception of radio frequency waves. The present invention provides meansfor utilizing an antenna cable in conjunction with the whip antennawhereby an increased surface for reception of waves of both higher andlower frequencies of waves propagated at radio frequencies will bereceived.

Still further objects and features of this invention reside in theprovision of an antenna booster, preferred embodiments of which havebeen illustrated in the ac companying drawings, by way of example only,wherein:

Figure 1 is a perspective view of the instrument panel of an automotivevehicle illustrating the connection between a radio, an antenna, and theantenna booster comprising the present invention;

Figure 2 is an enlarged detailed view as taken along the plane of line22 of Figure 1;

Figure 3 is an enlarged sectional detail view as taken along the planeof line 33 in Figure 2;

Figure 4 is a greatly enlarged sectional detail view as taken along theplane of line 4-4 of Figure 3 Figure 5 is a longitudinal sectional Viewof a modified form of the invention; and

Figure 6 is a sectional detail view as taken along the plane of line 66of Figure 5.

With continuing reference to the accompanying drawings wherein likereference numerals designate similar parts throughout the various views,and with initial attention directed to the embodiment of the inventionas is shown in Figures 1 through 4, reference numeral 20 generallydesignates a vehicle radio having associated therewith a connector 22,see Figure 2, having a socket 24 for reception of a pin 26 as is usuallyprovided on an antenna lead-in wire. In lieu of connecting the antennalead-in wire in the socket 24, there is provided the booster 28utilizing the present invention which includes a cylinder 30 of suitableconductive material having a socket 32 therein provided and lined withan insert of insulating material as indicated at 34. Received in theinsert 34 and the peripheral edge of the cylinder 30 adjacent the end ofthe cylinder 30. The cylinder 30 is further provided with a forward cap38 and a plug 40 is held in insulating relationship with respect to thecap 38 by means of an insulation layer 42. The plug 40 has an end piece44 receivable within the socket 24. Receivable within the fitting 34 ofinsulative material is a plug 46 of a conductor 48 which is connected tothe whip antenna 50.

Terminals as at 52 and 54 are provided on the cylinder 30 to whichconductors 56 and 58 are connected, these conductors being trunked as at60 and then connected by means of a clip 62 to the frame or body of thevehicle. A ground lead 64 connects the caps 38.

Referring now to the embodiment of the invention as is shown in Figures5 and 6, it is noted that a plug on the cylinder 82 is connected to theradio 20 and is provided with a bore as at 84 which is adapted toreceive the plug 86 at the end of an antenna lead in wire 88 connectedto the antenna 90. Cylinder 82 comprises a hollow tube 92 ofelectrically conductive material haivng an insulative cap 94 threadedlysecured on the threaded end portion 96 thereof. The cap 94 holds theinsulative piece 98 in position. Cap 100 is threadedly secured to thethreaded end 102 of tube 92 and has a socket 108 for receiving plug 86.

Insulative sheathing 110 is provided and is secured to the tube 92. Anauxiliary antenna wire 114 and shield wire 112 extend through thesheathing 110 and are connected respectively to the plug 80 and the tube92. Auxiliary antenna wire 114 is connected to one side of a trimmer116. The other side of the trimmer 116 is electrically connected to acontinuation of the auxiliary antenna wire 118 which is covered byinsulation 120. The insulation 120 and shield wire 112 are trimmed fromthe wire 118 after passing through the floor boards of the vehicle.

The antenna shielded lead-in 120 provides additional means for receivingradio frequency signals, preferably those broadcast at the lowerfrequencies thereof whereby a signal of better quality and quantity maybe received.

The foregoing is considered as illustrative only of the principles ofthe invention. Further, since numerous modifications and changes willreadily occur to those skilled in the art, it is not desired to limitthe invention to the exact construction and operation shown anddescribed, and accordingly all suitable modifications and equivalentsmay be resorted to, falling within the scope of the invention asclaimed.

What is claimed as new is as follows:

1. An antenna system for utilization with a vehicle radio having anantenna input comprising a conventional whip antenna supported by saidvehicle exteriorly there of, an antenna lead-in wire connected to saidwhip antenna and remotely terminating in an antenna plug, an antennabooster, said booster including a capped tubular conductive cylinder, aconductive plug supported in said cylinder but insulated therefrom, saidplug projecting from said cylinder and detachably received in thevehicle radio antenna input, a socket extending into said cylinder, saidantenna plug receivably supported in said socket and electricallycommunicating with said conductive plug in said cylinder, an auxiliaryantenna wire, said antenna wire electrically connected to saidconductive plug.

2. An antenna system for utilization with a vehicle radio having anantenna input comprising a conventional whip antenna supported by saidvehicle exteriorly thereof, an antenna lead-in wire connected to saidwhip antenna and remotely terminating in an antenna plug, an antennabooster, said booster including a capped tubular conductive cylinder, aconductive plug supported in said cylinder but insulated therefrom, saidplug projecting from said cylinder and detachably received in thevehicle radio antenna input, a socket extending into said. cylinder,said antenna plug receivably supported in said socket and electricallycommunicating with said conductive plug in said cylinder, an auxiliaryantenna wire, said antenna wire electrically connected to saidconductive plug, a trimmer condenser electrically interposed in saidantenna Wire, said auxiliary antenna wire extending exteriorly of saidvehicle.

References Cited in the file of this patent UNITED STATES PATENTS2,248,236 Hollins et a1. July 8, 1941 2,659,001 Thorne Nov. 10, 19532,863,147 Berlin Dec.,2, 1958

